Magazine for shuttle changing looms



June 8, 1937. R TURNER 2,082,919

MAGAZINE FOR SHUTTLE CHANGING LOOMS Filed Sept. 21, 1936 Inventor Richavd Greemeai Turner Afiorney Patented June 8, 1937 PATENT OFFIQE MAGAZINE FOR SHUTTLE CHANGING LOOMS Richard Greenleaf Turner, Worcester, Mass, as-

signor to Crompton & Knowles Loom Works, Worcester, Mass, a corporation of Massachusetts Application September 21, 1936, Serial No. 101,746

6 Claims.

This invention relates to improvements in shuttle changing looms and it is the general object of the invention to improve the mechanism which permits the ejection from the loom of an untransferred shuttle.

i In a type of shuttle changing loom which has gone into extensive use there is employed a magazine having two stacks of reserve shuttles with a common compartment to receive a reserve shuttle drawn from either stack. The front of this compartment is closed in part by a yieldable wall which assists normally in guiding the incoming shuttle into a temporarily raised shuttle box the cover of which swings upwardly for the purpose. If for any reason the shuttle about to be put into action should fail to enter the shuttle box it is moved forwardly by the lay against the yieldable wall and the latter-ad vances to permit shuttle ejection.

.The lay moves about an axis near the floor on which the loom rests while the yielding wall as heretofore constructed has moved about an axis above the compartment and considerably in advance of it. As a result of this construction the shuttle to be ejected rises along an arcuate path while the wall in engagement with the shuttle moves downwardly so that for a considerable period these paths overlap and prevent proper ejection of the shuttle. Also, in its downward swing the wall rubs along the front of the shuttle and tends to twist it. It is the principal object of my present invention to provide means whereby the overlapping of the paths already mentioned may be substantially eliminated so that there will be a minimum of resistance offered to the shuttle as the latter moves away from the lay when ejected. Twisting of the shuttle is also practically eliminated due to the fact that the yielding wall has no appreciable down motion along the shuttle.

With these and other objects in View which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawing wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a top plan view of a lay and portion of the shuttle changing mechanism in the positions they assume when shuttle ejection is desirable,

Fig. 2 is a detailed vertical section taken on line 22 of Fig. 1 showing a shuttle at the beginning of its ejection, and

' Fig. 3 is a view similar to Fig. 2 but with the lay in its forward position and indicating how the shuttle is ejected from the loom.

Referring to the drawing, the lay It carries upper and lower shuttle boxes H and I2, respectively, which are normally down so that shuttle box II is active and opposite a stationary binder I3. A cover it for the upper box H is pivoted as at It to the rising box structure and carries a lug l6 which engages a cam IT as the lay recedes when the boxes are raised for the purpose of elevating the cover so as to expose the top of the shuttle box It on shuttle changing beats of the loom.

The magazine M comprises front and back stacks 20 and 2i for reserve shuttles S and S, respectively, which generally carry different kinds of weft. A support 22 is located under the rear stack to hold the bottom shuttle S and a plunger head 23 is provided to be moved forwardly to advance said bottom shuttle into a compartment 2 which lies under the lowermost shuttle S in the front stack 20. The latter shuttle is held above the compartment 24 by a yielding support 25 movable about an axis 26. An upper pad 2! may also move around axis 26 so that when the lower support 25 moves to the left as viewed in Fig. 2 the upper pad will move to the right against the next to the bottom shuttle in stack 20 to support the latter until the support 25 can return to its normal shuttle supporting position.

The lay has extending therefrom shuttle supporting fingers 30 on which the shuttles drawn from the magazine drop prior to arrival of the lay in its rearmost position. These fingers function as indicated in Fig. 3 to support a shuttle indicated at position A in dot and dash lines and as the lay moves rearwardly the forward part of the fingers 30 pass behind the rear shuttle wall to permit it to drop into the box II. The front of compartment 24 is defined in part by a wall 35 mounted on a pair of arms 36 which are supported by a rod 31 mounted in ears 38 on the front plate 39 of the magazine. A stop 28 on the magazine limits rear motion of the wall 35 under action of a spring to bedescribed.

The matter thus far described except for modifications in the mounting for the wall 35 to be described hereinafter may be the same as set forth in my prior Patents Nos. 2,054,171 and 2,054,172.

As already stated the cover l4 may fail to rise when the. box H is elevated to receive a shuttle from the compartment 24, or the boxes may fail to rise as they should, in which case the untransferred shuttle will occupy the position B shown in Fig. 2 with the rear wall thereof engaged by the front of the fingers 30 and also by a ledge ll! on the lay. Under these conditions it is desir able to eject the shuttle from' the loom and in the previously mentioned patent this result is accomplished by forward swinging of the wall 35 to the left as viewed in Fig. 2 along an arc'C about the rod 31 as a center. As is apparent from Fig. 2 however this are swings down and 7 therefore wall 35 slides ,frictionally down along the front of the shuttle as the lay advances, a

' condition which is likely to turn the shuttle and an arm35 against stop 28 so that wall 35 may be held yieldingly in correct normal position.

The rear end of finger 5| constitutes the pivot about which the wall 35 swings and by a reference to Figs. 2 and 3 it will be seen that this pivot is substantially over the wall 35. As a result of this relation the wall 35 will move along arc D which lies above are C and extends forwardly and upwardly so that the .wall does not scrape down along the shuttle as the lay advances.

In operation, should the shuttle transfer be defective, the front wall of shuttle in position B will engagethe wall 35 and the. latter will move about the pivot defined between the rear of fingers 5| and the ledge or shelf 52 in engagement therewith. As the lay advances the arms 36 will move out to some such position as that indicated in dotted lines in Fig. 2 to move wall 35 along a rising path, the slot 50 in each of the arms 36 permitting the upward motion of the said arms with respect to the rod 31. By reason of this construction the shuttle is released much earlier in the forward motion of the lay and can move without interference from the position shown in full lines to that indicated in dotted lines in Fig. 3. Scraping of the shuttle is reduced to a minimum, as is also the tendency to turn the shuttle.

From the foregoing it will be seen that I have provided a very simple mounting ,for the front wall of the compartment 24 which permits said wall to move along a path which is considerably higher than that possible by previous constructions to release an untransferred shuttle with a minimum of resistance. When the wall 35 reaches the top of the shuttle being ejected said wall will have no substantial further forward motion and the rear of the shuttle can be moved entirely clear of said wall before the lay reaches its front position with the result that the shuttle to be ejected is positively moved by the lay to a point beyond the wall 35 while the lay is still moving fast enough to give the shuttle enough momentum to discharge it from the lay. It will be seen that this result is accomplished by permitting the arms 36 to move upwardly with re- 55 not only permits the yielding of wall 35 but also acts to restore the latter to its normal position after a shuttle has been ejected. Furthermore, tilting and scraping of the shuttle is practically eliminated because of the relation between the wall 35 and its pivot.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing fromthe spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a shuttle changing loom, a magazine for reserve shuttles having a compartment through which reserve shuttles pass during a shuttle changing operation, a lay, means on the lay under the compartments to engage the rear wall of an improperly transferred shuttle as the lay moves forwardly from the compartment, a front wall for the compartment, and means constituting a pivotal support for the front wall located so as to cause the latter to move upwardly and forwardly throughout engagement with an improperly transferred shuttle.

2. In a shuttle changing loom, a magazine having a compartment through which a reserve shuttle passes during a shuttle changing operation, a lay tov receive a shuttle from the compartment, a front wall for said compartment, 3. support for said wall, and a pivot independent of said support and located therebehind and over the front wall to constitute an axis around which the latter moves when in engagement with a shuttle to be ejected from the lay.

3. In a shuttle changing loom having a compartment through which reserve shuttles pass during a shuttle changing operation, a lay to receive a reserve shuttle from the compartment, a

front wall for the compartment, a rod parallel to the compartment and located above and in front thereof, support arms for the wall having slots through which the rod passes, a finger extending rearwardly from and carried by the arms, and means to engage the finger and cooperate therewith to constitute a pivotal support behind the rod and above the wall around which the latter swings when in engagement with an improperly transferred shuttle.

4. In a shuttle changing loom, a magazine having a compartment through which reserve shuttles pass during a shuttle changing operation, a

yieldable front wall for the compartment, a rod parallel tov the compartment and supported by the magazine, arms extending upwardly from the wall and having substantially vertical slots therein through which the rod passes, a finger extending rearwardly from and secured to the arms, and means on the magazine to engage said. finger above the wall and behind the rod, the last named means and finger constituting a pivotal support around which the wall moves when in engagesupported by the magazine passing through the slots, and means to define the pivotal connection between the arms and the magazine at a point behind the rod to cause the wall to move along an upwardly extending are when in engagement with a shuttle which fails to complete a shuttle changing motion.

6. A reserve shuttle support for a magazine having a reserve shuttle compartment, a rod running parallel to the compartment and a supporting ledge on the magazine behind the rod, said support comprising a lower wall extending along the front of the compartment, a pair of upwardly extending arms to support the wall and having vertical slots therein through which the rod extends and a member extending rearwardly from one of the arms to have engagement with the 5 ledge. RICHARD GREENLEAF TURNER. 

